Effect of pore formation on redox-driven phase transformation
File(s)
Published version
Author(s)
Type
Journal Article
Abstract
When solid-state redox-driven phase transformations are associated with mass loss, vacancies are
produced that develop into pores. These pores can influence the kinetics of certain redox and phase
transformation steps. We investigated the structural and chemical mechanisms in and at pores in a
combined experimental-theoretical study, using the reduction of iron oxide by hydrogen as a model system.
The redox product (water) accumulates inside the pores and shifts the local equilibrium at the already
reduced material back toward reoxidation into cubic Fe1-xO (where x refers to Fe deficiency, space group
Fm3¯m). This effect helps us to understand the sluggish reduction of cubic Fe1-xO by hydrogen, a key
process for future sustainable steelmaking
produced that develop into pores. These pores can influence the kinetics of certain redox and phase
transformation steps. We investigated the structural and chemical mechanisms in and at pores in a
combined experimental-theoretical study, using the reduction of iron oxide by hydrogen as a model system.
The redox product (water) accumulates inside the pores and shifts the local equilibrium at the already
reduced material back toward reoxidation into cubic Fe1-xO (where x refers to Fe deficiency, space group
Fm3¯m). This effect helps us to understand the sluggish reduction of cubic Fe1-xO by hydrogen, a key
process for future sustainable steelmaking
Date Issued
2023-04-21
Date Acceptance
2023-03-03
Citation
Physical Review Letters, 2023, 130 (16)
ISSN
0031-9007
Publisher
American Physical Society
Journal / Book Title
Physical Review Letters
Volume
130
Issue
16
Copyright Statement
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Open access publication funded by the Max Planck Society.
License URL
Identifier
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.130.168001
Subjects
GROWTH
IRON-OXIDE
Physical Sciences
Physics
Physics, Multidisciplinary
PROPAGATION
REDUCTION
Science & Technology
Publication Status
Published
Article Number
168001
Date Publish Online
2023-04-19